[Elecraft] Fw: antennas for Susan

Tom W8JI w8ji at w8ji.com
Mon Aug 2 12:23:29 EDT 2010


> How is an antenna that is shorter than 1/2 wavelength called a half
> wavelength antenna?

Marketing department.


Does adding loading coils really turn it back into a
> 1/2
> wavelength antenna?

Only in the marketing department.

> Seems to me that the current distribution and resulting radiation pattern
> would change if it's short regardless of loading. I keep seeing these
> antennas show up on the market and just want to be sure I'm right.

With reasonable size and the correct loading, tip loading with a large 
capacitance hat, it can almost be the same.

What gets me are the trap antennas advertised as "no traps" or "no loading 
coils", or having "lossless linear loading" when the system is usually 
lossier than what they are proposing to eliminate.

Marketing departments convinced us traps are bad so they could sell us 
things worse than traps by telling us they have "no lossy traps"...which is 
claimed even if the antenna has traps by simply calling the trap something 
else. Most of the time traps would have less loss than the systems we are 
convinced are better.

73 Tom 



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